CN115024581A - Drawing device is assisted with scene to environmental design - Google Patents

Abstract

The invention provides a field auxiliary drawing device for environmental design, which solves the problem that a drawing board is large in area and inconvenient to carry. Including the drawing board, four edges of drawing board bottom surface all articulate there is the supporting leg, it has the extension groove to run through between the side about the drawing board, both ends difference slidable mounting has two bilateral symmetry's the bearing board about extension inslot portion, it has the support groove to open on the top surface of every bearing board, it has a plurality of bearing square poles of controlling the orientation range all to slidable mounting about all in the support groove, it has a plurality of camshafts to run through and rotate between the side about every bearing board, connect through band pulley group between a plurality of camshafts of every bearing board inside, all rotate on every camshaft and install a plurality of bearing cams, and every bearing cam is in one of them bearing square pole below respectively, all be connected with the cam torsional spring between every bearing cam and the camshaft. The invention can complete the adjustment of the size of the bearing surface of the drawing board, is suitable for drawings with different sizes and is convenient to carry.

Description

Drawing device is assisted with scene to environmental design

Technical Field

The invention relates to the technical field of environmental design, in particular to a field auxiliary drawing device for environmental design.

Background

The environmental design belongs to the design category of the subjects of art science, which means that the practical art created by integrating the objective environment of a certain subject or a plurality of subjects by the designed manipulation is a new emerging design category, and the subjects contained in the design category are quite extensive and mainly comprise: architectural design, indoor design, public art design, landscape design and other contents, and the environmental design usually needs hand drawing paper to record in the field survey.

At present, when drawing is carried out on site, drawing paper is usually placed on a table board at a certain position to draw in combination with a site environment, but the table board at the site is usually uneven and difficult to support drawing paper to draw, so that a drawing pen penetrates through the drawing paper or a large drawing board is carried, but the drawing board is large in area and inconvenient to carry, the bearing surface of the drawing board cannot be adjusted according to the size of the drawing paper, and when the drawing paper is small, the drawing board is large in area and inconvenient to carry; when the drawing is large, the drawing board cannot bear all drawings.

Therefore, the present invention provides a field-assisted drawing device for environmental design to solve the above problems.

Disclosure of Invention

Aiming at the situation, in order to overcome the defects of the prior art, the invention provides the on-site auxiliary drawing device for environmental design, which effectively solves the problems that when drawing is carried out on site, a drawing pen penetrates through the drawing due to the fact that a drawing is difficult to support due to uneven table top, the drawing board is large in area and inconvenient to carry, and the bearing surface of the drawing board cannot be adjusted according to the size of the drawing.

An on-site auxiliary drawing device for environmental design comprises a square drawing board, wherein four edges of the bottom surface of the drawing board are respectively provided with a supporting leg groove, one end of the inner part of each supporting leg groove is hinged with a supporting leg, the four supporting legs are connected with a supporting driving device, each supporting leg is internally provided with an extending leg in a sliding way, an extending groove penetrates through the left side surface and the right side surface of the drawing board, the left end and the right end of the inner part of the extending groove are respectively provided with two bilaterally symmetrical bearing plates in a sliding way, the two bearing plates are respectively connected with an extending device positioned in the extending groove, the top surface of each bearing plate is provided with a bearing groove, a plurality of bearing square rods arranged in the left and right directions are respectively arranged in the bearing groove in an up-down sliding way, a plurality of cam shafts positioned below the bearing square rods are arranged between the left side surface and the right side surface of each bearing plate in a penetrating and rotating way, every all connect through band pulley group between the inside a plurality of camshafts of bearing board, every all rotate on the camshaft and install a plurality of bearing cams, and every the bearing cam is in one of them bearing square pole below respectively, every all be connected with the cam torsional spring between bearing cam and the camshaft.

Preferably, the support driving device comprises support driven belt wheels coaxially and fixedly arranged at the hinged parts of the support legs and the support leg grooves, a support driving belt wheel is rotatably arranged on one side surface of each support leg groove close to the center of the drawing board, a support belt is connected between each support belt wheel and each support leg belt wheel, a supporting circular groove is arranged in the middle of the bottom surface of the drawing board, each supporting driving belt wheel is coaxially and fixedly connected with a supporting rotating shaft which penetrates through the drawing board and the other end of which is positioned in the supporting circular groove, one end of each supporting rotating shaft positioned in the supporting circular groove is coaxially and fixedly provided with a supporting driven bevel gear, the supporting rotary table is coaxially and rotatably arranged at the opening of the supporting circular groove, and supporting driving bevel gears meshed with the four supporting driven bevel gears are fixedly arranged on one surface of the supporting rotary table, which is positioned in the supporting circular groove.

Preferably, a plurality of supporting positioning holes which are uniformly distributed in a circumferential direction are formed in the inner side surface of the opening of the supporting disc, a supporting long groove is formed in the bottom surface of the supporting turntable, two supporting positioning blocks which are symmetrical in position are installed in the supporting long groove in a sliding mode, supporting positioning pins which penetrate through the outer side surface of the supporting turntable and are respectively inserted into one supporting positioning hole are fixedly connected to the surfaces, away from each other, of the two supporting positioning blocks, supporting positioning springs are installed between the two supporting positioning blocks, and operation round holes are formed in the two supporting positioning blocks.

Preferably, every the inside cavity and the bottom opening of supporting leg, every the equal slidable mounting of extension leg is in the supporting leg, every all open the extension on the side of supporting leg and erect the groove, every the extension draw-in groove that has a plurality of equidistance to arrange is all opened on the side of extension perpendicular groove, every all open the extension spout on the top side of extension leg, every equal slidable mounting has the extension slider in the extension spout, every install the extension spring between extension slider and the extension spout, every equal fixed mounting has the extension bayonet lock on the extension slider.

Preferably, the stretching device comprises rack sliding grooves formed in the inner walls of the front side and the rear side of the stretching groove, stretching racks are arranged in the rack arc grooves in a sliding mode, the stretching racks are located on the inner wall of the rear side of the stretching groove and fixedly connected with the rear side face of the supporting plate located on the right side, the stretching racks are located on the inner wall of the front side of the stretching groove and fixedly connected with the front side face of the supporting plate located on the left side, two stretching gears meshed with the front stretching racks and the rear stretching gears are respectively rotatably arranged at the front end and the rear end of the bottom face of the stretching groove, and a stretching belt wheel set is connected between the stretching gears.

Preferably, a driven bevel gear is coaxially and fixedly connected to the top of the extension gear located on the front side, an extension knob is actively mounted on the front side surface of the drawing board, and an extension bevel gear located in the extension groove and meshed with the driven bevel gear is coaxially and fixedly mounted on the extension knob.

Preferably, every the equal coaxial slidable mounting of one of them camshaft on the bearing board of keeping away from the one end of drawing board has the bearing knob, it has the arc wall to open on the side that the drawing board was kept away from to the bearing board, the bearing jack has all been opened at the both ends of arc wall, equal fixed mounting has the bearing bolt that is located the arc wall and inserts in the bearing jack on the bearing knob, be connected with the knob spring between bearing knob and the camshaft.

Preferably, a placing groove located below the extending groove is formed in the front side face of the drawing board, a drawer is slidably mounted in the placing groove, and a lock catch connected with the front side face of the drawing board is fixedly mounted on the drawer.

Compared with the prior art, the drawing support platform can provide a drawing support platform for environment design field drawing, and avoids the situation that drawing is penetrated by a drawing pen when the drawing is placed on uneven ground or other planes.

Drawings

Fig. 1 is a first perspective view of the present invention.

Fig. 2 is a second perspective view of the present invention.

Fig. 3 is a schematic top sectional perspective view of the present invention.

Fig. 4 is a schematic right-side sectional perspective view of the present invention.

Fig. 5 is a schematic bottom sectional view of the present invention.

Figure 6 is a schematic perspective view of two support plates of the present invention after deployment.

Figure 7 is a front sectional perspective view of two pallets of the present invention after deployment.

Fig. 8 is an enlarged view of the invention at a in fig. 3.

Fig. 9 is an enlarged view of the invention at B in fig. 3.

Fig. 10 is a schematic view of the installation of the extension gear and the extension rack of the present invention.

Fig. 11 is an enlarged view of the invention at C in fig. 4.

Fig. 12 is a schematic sectional perspective view of the support turntable of the present invention.

Fig. 13 is an enlarged view of the invention at D in fig. 7.

Figure 14 is a perspective view of a support knob and arcuate slot of the present invention.

Fig. 15 is an enlarged view at E of fig. 13 in accordance with the present invention.

FIG. 16 is a perspective view of a support leg of the present invention.

Detailed Description

The foregoing and other aspects, features and advantages of the invention will be apparent from the following more particular description of embodiments of the invention, as illustrated in the accompanying drawings in which reference is made to figures 1 to 16. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.

Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

The invention relates to a field auxiliary drawing device for environmental design, which comprises a square drawing board 1, wherein the drawing board 1 can be made of light materials, such as aluminum or plastic, so as to reduce the weight of the drawing board 1 and facilitate carrying, leg grooves 2 are formed at four edges of the bottom surface of the drawing board 1, a support leg 3 is hinged at one end inside each leg groove 2, the four support legs 3 are connected with a support driving device 4, the four support legs 3 can be contracted inside the four leg grooves 2 when not in use, the four support legs 3 can be simultaneously driven by the support driving device 4 to move outwards from the four leg grooves 2 to be vertical to the bottom of the drawing board 1 when in use, so as to support the drawing board 1, an extension leg 5 is slidably arranged in each support leg 3, the height of the drawing board 1 can be increased after the extension leg 5 is pulled out from the support leg 3, the four extending legs 5 can be pulled out independently, when the ground is uneven, the four extending legs 5 can be adjusted correspondingly, so that the top surface of the drawing board 1 is kept horizontal, and then the drawing paper can be flatly laid on the top surface of the drawing board 1 for drawing;

an extension groove 6 penetrates through the left side surface and the right side surface of the drawing board 1, two bilaterally symmetrical bearing plates 7 are respectively and slidably mounted at the left end and the right end in the extension groove 6, the two bearing plates 7 can synchronously slide in the extension groove 6 in the direction of mutual distance or the direction of mutual approach, the two bearing plates 7 are both connected with an extension device 8 positioned in the extension groove 6, the extension device 8 can drive the two bearing plates 7 to slide in the extension groove 6, a bearing groove 9 is arranged on the top surface of each bearing plate 7, a plurality of bearing square rods 10 arranged in the left direction and the right direction are respectively and slidably mounted in each bearing groove 9 from top to bottom, the contact surfaces of every two adjacent bearing square rods 10 are tightly contacted, the top surfaces of the plurality of bearing square rods 10 are flush with the top surfaces of the bearing plates 7, each bearing square rod 10 can slide up and down in the bearing groove 9, and when the bearing square rods 10 slide up, the bearing square rods can be flush with the top surface of the drawing board 1, when the bearing area of the drawing board 1 needs to be adjusted, the two bearing plates 7 can be driven by the extending device 8 to slide out for a certain distance from the inside of the extending groove 6 to the left side and the right side of the drawing board 1, then the plurality of bearing square rods 10 on the left side and the right side of the drawing board 1 can be upwards slid to the positions flush with the top surface of the drawing board 1, a bearing surface larger than the top surface of the drawing board 1 is formed between the top surface of the drawing board 1 and the top surfaces of the plurality of bearing square rods 10 at the moment, a larger drawing can be placed for drawing, the distance between the two bearing plates 7 outwards sliding out of the left side and the right side of the drawing board 1 can be adjusted according to the size of the drawing, so that the bearing square rods 10 with different numbers slide upwards to be flush with the top surface of the drawing board 1, and the drawing board is suitable for drawings with different sizes;

a plurality of cam shafts 11 positioned below the supporting square rods 10 penetrate through and are rotatably mounted between the left side surface and the right side surface of each supporting plate 7, the plurality of cam shafts 11 in each supporting plate 7 are connected through a belt pulley set 12, so that the plurality of cam shafts 11 in the same supporting plate 7 can synchronously rotate, a plurality of supporting cams 13 are rotatably mounted on each cam shaft 11, each supporting cam 13 is positioned below one of the supporting square rods 10, and a cam torsion spring 14 is connected between each supporting cam 13 and each cam shaft 11;

as shown in fig. 13, 14 and 15, when a part of the supporting square rods 10 are located at the left and right sides of the drawing board 1, i.e. at the outer side of the extending slot 6), at this time, the tops of the supporting square rods 10 are not subjected to downward external force, the cam shaft 11 rotates to drive the supporting cam 13 to rotate through the elastic force of the cam torsion spring 14 itself, the distal end of the supporting cam 13 thereby jacks up the supporting square rods 10 to a position flush with the top surface of the drawing board 1, while the top of the supporting square rod 10 located inside the extending slot 6 is restricted by the top surface of the extending slot 6 and cannot slide upwards, when the cam shaft 11 rotates, the supporting cams 13 located below the part of the supporting square rods 10 cannot rotate, the cam shaft 11 only drives the cam torsion springs 14 connected with the part of the supporting cam 13 that cannot rotate to rotate, and the other supporting cams 13 located outside the extending slot 6 normally rotate, thereby bringing the bearing square bar 10 to slide upwards to a position flush with the top surface of the drawing board 1.

In the second embodiment, on the basis of the first embodiment, the supporting driving device 4 includes supporting driven pulleys 15 coaxially and fixedly installed at the hinged positions of the supporting legs 3 and the supporting leg grooves 2, the supporting driven pulleys 15 can drive the supporting legs 3 to rotate from the supporting leg grooves 2 when rotating, supporting driving pulleys 16 are rotatably installed on one side surface of each supporting leg groove 2 close to the center of the drawing board 1, a supporting belt 17 is connected between each group of supporting pulleys 16 and the supporting leg pulleys 15, a supporting circular groove 18 is formed in the middle of the bottom surface of the drawing board 1, a supporting rotating shaft 19 penetrating through the drawing board 1 and having the other end located inside the supporting circular groove 8 is coaxially and fixedly connected to each supporting driving pulley 16, the supporting rotating shaft 19 can drive the supporting driving pulleys 16 to rotate, so as to drive the supporting leg driven pulleys 15 to rotate, and a supporting driven bevel gear 20 is coaxially and fixedly installed at one end of each supporting rotating shaft 19 located inside the supporting circular groove 18, support driven bevel gear 20 and can drive support pivot 19 and rotate, the coaxial rotation of opening part of support circular slot 18 is installed and is supported carousel 21, supports carousel 21 and can be in supporting circular slot 18 rotation, support carousel 21 be located support circular slot 18 one side on fixed mounting have with four support driven bevel gear 20 meshed support drive bevel gear 22, can drive four support driven bevel gear 20 rotations through supporting drive bevel gear 22 in step when supporting carousel 21 rotates to make four supporting legs 3 can follow four landing leg difference 2 in synchronous outside removal, thereby support drawing board 1.

In the third embodiment, on the basis of the second embodiment, a plurality of support positioning holes 23 are uniformly distributed on the circumference of the inner side surface of the opening of the support turntable 18, a support long groove 24 is formed on the bottom surface of the support turntable 21, two support positioning blocks 25 with symmetrical positions are slidably mounted in the support long groove 24, one surface of each of the two support positioning blocks 25, which is far away from each other, is fixedly connected with a support positioning pin 26 which penetrates through the outer side surface of the support turntable 21 and is respectively inserted into one of the support positioning holes 23, a support positioning spring 27 is mounted between the two support positioning blocks 25, an operation round hole 01 is formed in each of the two support positioning blocks 25, the two support positioning blocks 25 are always far away from each other and the two support positioning pins 26 are always inserted into the two support positioning holes 23 under the elastic force of the support positioning spring 27, and at this time, the support turntable 18 cannot rotate, four supporting legs 3 can't expand downwards and support in the bottom of drawing board 1 this moment, when needs support, can use two fingers to two support locating piece 25 of middle part slip in the empty 01 of operator for two support locating pin 26 break away from in two of them support locating hole 23, can rotate support carousel 18 this moment, carry out above-mentioned operation in succession and can expand four supporting legs 3 below, and support drawing board 1.

Fourth embodiment, on the basis of the first embodiment, each of the support legs 3 is hollow inside and has an open bottom end, each of the extension legs 5 is slidably mounted in the support leg 3, so that each of the extension legs 5 can extend or contract in the support leg 3, each of the support legs 3 has a through extension vertical slot 28 on a side surface thereof, each of the extension vertical slots 28 has a plurality of equally spaced extension slots 29 on a side surface thereof, each of the extension legs 5 has an extension sliding slot 30 on a top side surface thereof, each of the extension sliding slots 30 has an extension slider 31 slidably mounted therein, an extension spring 32 is mounted between each of the extension sliders 31 and the extension sliding slot 30, each of the extension sliders 31 has an extension bayonet pin 33 fixedly mounted thereon, and under the elastic force of the extension spring 32, the extension bayonet pin 33 on the extension slider 31 is always located in one of the extension slots 29, when the length of the extension leg 5 needs to be adjusted, the extension bayonet pin 33 can be manually moved from the extension bayonet slot 29 to the extension vertical slot 28, so as to drive the extension sliding block 31 to slide towards the other end in the extension sliding slot 30 and compress the extension spring 32, at the moment, after the extension leg 5 can move up and down to a proper position, the extension bayonet pin 33 is loosened to enable the extension bayonet pin to enter the extension bayonet slot 29 at a corresponding position under the elastic force of the extension spring 32, and at the moment, the extension leg 5 cannot move up and down.

Fifth embodiment, on the basis of the first embodiment, the stretching device 8 includes rack sliding grooves 34 formed on the front and rear inner walls of the stretching groove 6, stretching racks 35 are slidably installed in both of the rack sliding grooves 34, the stretching rack 35 located on the rear inner wall of the stretching groove 6 is fixedly connected to the rear side surface of the support plate 7 located on the right side, the stretching rack 35 located on the front inner wall of the stretching groove 6 is fixedly connected to the front side surface of the support plate 7 located on the left side, when the two stretching racks 35 synchronously slide in the respective rack sliding grooves 34, the two support plates 7 can be simultaneously driven to slide outwards or inwards in the stretching groove 6, two stretching gears 36 respectively engaged with the front and rear stretching racks 35 are rotatably installed at the front and rear ends of the bottom surface of the stretching groove 6, and a stretching pulley group 37 is connected between the two stretching gears 36, make two extend gear 36 synchronous rotations through extending band pulley group 37, as shown in fig. 8, 9, 10, when two extend gear 36 clockwise, the extension gear 36 that is located the front side can drive the extension rack that is located the front side and move to the left to drive left bearing board 7 and move to the left, the extension gear 36 that is located the rear side simultaneously then can drive the extension rack that is located the rear side and move to the right, thereby drive right bearing board 7 and move to the right, on the contrary, when two extend gear 36 anticlockwise, two extend gear 36 then can drive two bearing boards 7 simultaneously and slide to the middle part that extends groove 6.

Sixth embodiment, on the basis of the fifth embodiment, a driven bevel gear 38 is coaxially and fixedly connected to the top of the extension gear 36 located on the front side, an extension knob 39 is actively installed on the front side surface of the drawing board 1, an extension bevel gear 40 located in the extension groove 6 and meshed with the driven bevel gear 38 is coaxially and fixedly installed on the extension knob 39, the extension bevel gear 40 is driven to rotate by rotating the extension knob 39, and the extension bevel gear 40 drives the driven bevel gear 38 to rotate, so that the two extension gears 36 are driven to synchronously rotate.

Seventh embodiment, on the basis of the first embodiment, a bearing knob 41 is coaxially and slidably installed at one end of one of the cam shafts 11 on each of the bearing plates 7, which is away from the drawing board 1, the cam shaft 11 can be driven to rotate by the bearing knob 41, an arc-shaped groove 42 is formed on the side of the bearing plate 7, which is away from the drawing board 1, the angle of the arc-shaped groove 42 is 90 °, bearing insertion holes 43 are formed on inner side surfaces of both ends of the arc-shaped groove 42, bearing bolts 44, which are located in the arc-shaped groove 42 and inserted into the bearing insertion holes 43, are fixedly installed on the bearing knobs 41, a knob spring 45 is connected between the bearing knobs 41 and the cam shaft 11, the bearing bolts 44 are always inserted into one of the bearing insertion holes 43 under the elastic force of the knob spring 45, at this time, the bearing knobs 41 cannot rotate, when the cam shaft 11 needs to rotate, the bearing knobs 41 can slide outwards on the cam shaft 11 and compress the knob spring 45, make bearing bolt 44 extract to the arc wall 42 in from bearing jack 43, then rotate bearing knob 41 90, make bearing bolt 44 remove to the other end from the one end of arc wall 42, camshaft 11 also rotates 90 simultaneously and drives partly bearing cam 12 and rotates and upwards jack-up and flush 1 top surface of drawing board with partial bearing square pole 10, can loosen bearing knob 41 this moment and make bearing bolt 44 insert and fix in another bearing jack 43, camshaft 11 is unable to rotate this moment, a plurality of bearing cams 12 jack-up partly bearing square pole 10 all the time, when needs resume initial state, repeated above-mentioned action with bearing knob 41 opposite direction rotate back the normal position can.

Eighth embodiment, on the basis of the first embodiment, a placing groove 46 located below the extending groove 6 is opened on the front side surface of the drawing board 1, a drawer 47 is slidably installed in the placing groove 46, a handle is installed on the drawer 47, a lock catch 48 connected with the front side surface of the drawing board 1 is fixedly installed on the drawer 47, a drawing tool can be placed in the drawer 47, the drawer 47 can be fixedly connected with the body of the drawing board 1 through the lock catch 48, and then the handle can be held to lift the whole drawing board 1 for carrying.

Compared with the prior art, the drawing support platform can provide a drawing support platform for environment design field drawing, and avoids the situation that drawing is penetrated by a drawing pen when the drawing is placed on uneven ground or other planes.

Claims (8)

1. The on-site auxiliary drawing device for the environmental design comprises a square drawing board (1) and is characterized in that supporting leg grooves (2) are formed in four edges of the bottom surface of the drawing board (1), one end of each supporting leg groove (2) is hinged with a supporting leg (3), the four supporting legs (3) are connected with supporting driving devices (4), each supporting leg (3) is internally provided with an extending leg (5) in a sliding mode, an extending groove (6) penetrates through the left side surface and the right side surface of the drawing board (1), two bearing plates (7) which are symmetrical left and right are arranged at the left end and the right end of the inner part of the extending groove (6) in a sliding mode respectively, the two bearing plates (7) are connected with extending devices (8) which are positioned in the extending grooves (6), a bearing groove (9) is formed in the top surface of each bearing plate (7), a plurality of bearing square rods (10) which are arranged in the left direction and the right direction are arranged in a sliding mode vertically in each bearing groove (9), every run through and rotate between the side about bearing board (7) and install a plurality of camshafts (11) that are located bearing square bar (10) below, every all connect through band pulley group (12) between a plurality of camshafts (11) of bearing board (7) inside, every all rotate on camshaft (11) and install a plurality of bearing cams (13), and every bearing cam (13) are in one of them bearing square bar (10) below, every all be connected with cam torsional spring (14) between bearing cam (13) and camshaft (11).

2. The on-site auxiliary drawing device for environmental design according to claim 1, wherein the supporting driving device (4) comprises supporting driven pulleys (15) coaxially and fixedly installed at the hinged positions of the supporting legs (3) and the supporting leg grooves (2), a supporting driving pulley (16) is rotatably installed on one side surface of each supporting leg groove (2) close to the center of the drawing board (1), a supporting belt (17) is connected between each group of supporting pulleys (16) and the supporting leg pulleys (15), a supporting circular groove (18) is formed in the middle of the bottom surface of the drawing board (1), each supporting driving pulley (16) is coaxially and fixedly connected with a supporting rotating shaft (19) penetrating through the drawing board (1) and the other end of each supporting rotating shaft (19) is located inside the supporting circular groove (8), a supporting driven bevel gear (20) is coaxially and fixedly installed at one end of each supporting rotating shaft (19) located inside the supporting circular groove (18), the opening of the supporting circular groove (18) is coaxially and rotatably provided with a supporting turntable (21), and one surface of the supporting turntable (21) positioned in the supporting circular groove (18) is fixedly provided with supporting driving bevel gears (22) meshed with the four supporting driven bevel gears (20).

3. The on-site auxiliary drawing device for environmental design according to claim 2, wherein a plurality of supporting positioning holes (23) are formed in the inner side surface of the opening of the supporting disk (18) and are uniformly distributed in the circumferential direction, a supporting long groove (24) is formed in the bottom surface of the supporting disk (21), two supporting positioning blocks (25) which are symmetrical in position are slidably mounted in the supporting long groove (24), the outer side surface of the supporting disk (21) is fixedly connected to the two surfaces, away from each other, of the two supporting positioning blocks (25), a supporting positioning pin (26) penetrates through the outer side surface of the supporting disk (21) and is inserted into one of the supporting positioning holes (23) respectively, a supporting positioning spring (27) is mounted between the two supporting positioning blocks (25), and an operating circular hole (01) is formed in the two supporting positioning blocks (25).

4. The on-site auxiliary drawing device for environmental design according to claim 1, wherein each of the supporting legs (3) is hollow inside and has an opening at the bottom end, each of the extending legs (5) is slidably mounted in the supporting leg (3), each of the supporting legs (3) is provided with an extending vertical slot (28) on the side surface, each of the extending vertical slots (28) is provided with a plurality of extending slots (29) arranged at equal intervals on one side surface, each of the extending legs (5) is provided with an extending chute (30) on the top side surface, each of the extending slots (30) is provided with an extending slider (31) therein, each of the extending slider (31) and the extending chute (30) is provided with an extending spring (32) therebetween, and each of the extending slider (31) is provided with an extending bayonet (33) thereon.

5. The site-assisted drawing device for environmental design according to claim 1, the stretching device (8) comprises rack sliding grooves (34) formed in the front inner wall and the rear inner wall of the stretching groove (5), stretching racks (35) are arranged in the two rack arc grooves (34) in a sliding mode, the stretching racks (35) positioned on the inner wall of the rear side of the stretching groove (5) are fixedly connected with the rear side face of the supporting plate (7) positioned on the right side, the stretching racks (35) positioned on the inner wall of the front side of the stretching groove (5) are fixedly connected with the front side face of the supporting plate (7) positioned on the left side, two extension gears (36) which are respectively meshed with the front extension rack (35) and the rear extension rack (35) are respectively rotatably arranged at the front end and the rear end of the bottom surface of the extension groove (5), and an extension belt wheel set (37) is connected between the two extension gears (36).

6. The drawing device for assisting the scene in drawing the environmental design as claimed in claim 5, wherein a driven bevel gear (38) is coaxially and fixedly connected to the top of the extension gear (36) positioned at the front side, an extension knob (39) is actively mounted on the front side surface of the drawing board (1), and an extension bevel gear (40) which is positioned in the extension groove (6) and is engaged with the driven bevel gear (38) is coaxially and fixedly mounted on the extension knob (39).

7. The on-site auxiliary drawing device for environmental design according to claim 1, wherein a bearing knob (41) is coaxially and slidably mounted at one end, away from the drawing board (1), of one cam shaft (11) on each bearing plate (7), an arc-shaped groove (42) is formed in the side, away from the drawing board (1), of each bearing plate (7), bearing insertion holes (43) are formed in two ends of each arc-shaped groove (42), bearing insertion pins (44) which are located in the arc-shaped grooves (42) and inserted into the bearing insertion holes (43) are fixedly mounted on each bearing knob (41), and a knob spring (45) is connected between each bearing knob (41) and the cam shaft (11).

8. The drawing device is used for assisting in drawing an environmental design according to claim 1, wherein a placing groove (46) located below the extending groove (6) is formed in the front side surface of the drawing board (1), a drawer (47) is slidably mounted in the placing groove (46), and a lock catch (48) connected with the front side surface of the drawing board (1) is fixedly mounted on the drawer (47).

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